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<p>Salt stress exerts deleterious affect on plant growth and development which ultimately lowers the crop yield. The application of biogenic nanoparticles alleviates salt stress by improving plant growth and yields. This study elucidated the interactive effects of salinity (150 mM) and Mn<sub>2</sub>O<sub>3</sub>-NPs synthesized from a halophytic plant <i>Phragmites karka</i> on growth and ecophysiological characteristics of maize. The characterization of nanoparticles was done using Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction, Scanning electron microscopy (SEM) and Ultraviolet–visible (UV–Vis) Spectrophotometry. Plants of <i>Zea mays</i> were grown using half strength Hoagland solution and variable salinities (0, 100 and 150 mM NaCl). Pots for experiments were arranged in a completely randomized design (two trays with 3 mugs each and a total of 6 replicates per treatment). Plant growth decreased to 150 and 100 mM NaCl. However, the application of Mn<sub>2</sub>O<sub>3</sub>-NPs improved fresh and dry biomass specifically in 100 mM NaCl due to increases in turgor (Ψ<sub>p</sub>) and lower (more negative) water (Ψw), osmotic (Ψπ) potentials. Leaf Na<sup>+</sup> in maize was increased under saline conditions but decreased in Mn<sub>2</sub>O<sub>3</sub>-NPs treatments while K<sup>+</sup> was increased. Plant pigments, maximum potential yield i.e., Y(II), Heat dissipation (NPQ) and Electron transport rate (ETR) increased with the application of Mn<sub>2</sub>O<sub>3</sub>-NPs in NaCl treatments compared to their respective controls. Damage markers, osmolytes, antioxidant enzymes and secondary metabolites increased in NaCl treatments and decreased in Mn<sub>2</sub>O<sub>3</sub> treated plants due to efficient ROS scavenging manifested by decreases in H<sub>2</sub>O<sub>2</sub>, MDA and EL Our findings suggest that Mn<sub>2</sub>O<sub>3</sub>-NPs improved plant growth under saline conditions which could potentially help in increasing yield and production of maize on a mass scale.</p>

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Application of manganese oxide nanoparticles improves biomass of Zea mays plants by upregulating nutrient fluxes and oxidative balance under saline conditions

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月7日

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  • Samma Ain,
  • Muhammad Faheem Siddiqui,
  • Irfan Aziz,
  • Sheraz Shafiq,
  • Sadia Fatima,
  • Simeen Mansoor,
  • Meher Hassan,
  • Saud Hashmi,
  • Mohamed A. El-Sheikh,
  • Zainul Abideen

摘要

Salt stress exerts deleterious affect on plant growth and development which ultimately lowers the crop yield. The application of biogenic nanoparticles alleviates salt stress by improving plant growth and yields. This study elucidated the interactive effects of salinity (150 mM) and Mn2O3-NPs synthesized from a halophytic plant Phragmites karka on growth and ecophysiological characteristics of maize. The characterization of nanoparticles was done using Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction, Scanning electron microscopy (SEM) and Ultraviolet–visible (UV–Vis) Spectrophotometry. Plants of Zea mays were grown using half strength Hoagland solution and variable salinities (0, 100 and 150 mM NaCl). Pots for experiments were arranged in a completely randomized design (two trays with 3 mugs each and a total of 6 replicates per treatment). Plant growth decreased to 150 and 100 mM NaCl. However, the application of Mn2O3-NPs improved fresh and dry biomass specifically in 100 mM NaCl due to increases in turgor (Ψp) and lower (more negative) water (Ψw), osmotic (Ψπ) potentials. Leaf Na+ in maize was increased under saline conditions but decreased in Mn2O3-NPs treatments while K+ was increased. Plant pigments, maximum potential yield i.e., Y(II), Heat dissipation (NPQ) and Electron transport rate (ETR) increased with the application of Mn2O3-NPs in NaCl treatments compared to their respective controls. Damage markers, osmolytes, antioxidant enzymes and secondary metabolites increased in NaCl treatments and decreased in Mn2O3 treated plants due to efficient ROS scavenging manifested by decreases in H2O2, MDA and EL Our findings suggest that Mn2O3-NPs improved plant growth under saline conditions which could potentially help in increasing yield and production of maize on a mass scale.